900172 has 24 divisors (see below), whose sum is σ = 1939616. Its totient is φ = 355968.

The previous prime is 900169. The next prime is 900187. The reversal of 900172 is 271009.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 873 + ... + 1600.

2⁹⁰⁰¹⁷² is an apocalyptic number.

It is an amenable number.

900172 is an abundant number, since it is smaller than the sum of its proper divisors (1039444).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

900172 is a wasteful number, since it uses less digits than its factorization.

900172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2497 (or 2495 counting only the distinct ones).

The product of its (nonzero) digits is 126, while the sum is 19.

The square root of 900172 is about 948.7739456794. The cubic root of 900172 is about 96.5550885938. Note that the first 3 decimals are identical.

The spelling of 900172 in words is "nine hundred thousand, one hundred seventy-two".